Malicious PDF — malware analysis report

Static analysis result for SHA-256 505217b3d3154079…

MALICIOUS

PDF

83.2 KB Created: 2021-04-30 21:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3e0ea6e4156532e72d73b1759dcb79a2 SHA-1: dd14742de2b13292d326a7ca7b4087b8c5a52668 SHA-256: 505217b3d3154079d4766e0cc79a2e945bb9b97dd2807f385aa84398931fcd4e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains obfuscated content and multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary malicious URL identified is https://midufefew.ru/strik, which is presented as a summary of the Bhagavad Gita chapter 18 in Hindi to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/strik?utm_term=bhagavad+gita+chapter+18+summary+in+hindi PDF link annotation
    • http://roman-holidays.shop/96632026631msspd.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/tolunibapugadevgrp6v.pdfIn PDF document text
    • http://leadtop.co/how_to_write_business_letter_exampleudm9l.pdfIn PDF document text
    • http://istlan.space/411211320864q30d.pdfIn PDF document text
    • http://openlait.pro/algebra_1_staar_eoc_review_1_answerszzojx.pdfIn PDF document text
    • http://wssummer.space/after_effects_template_royalty_free_mechanical_introkz3pb.pdfIn PDF document text
    • https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/7031020.pdfIn PDF document text
    • http://neojust.ru/gesudatijek2di0f.pdfIn PDF document text
    • https://fogovuraperikog.weebly.com/uploads/1/3/4/7/134713912/9265cc3.pdfIn PDF document text
    • http://forexgeeks.net/3157406010psf16.pdfIn PDF document text
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/zozirufape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_d980b5e2b0b44feba6d843b03ba5c6b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e96046-045b-4fcf-a8fb-839656057289/g_shock_ga100l-1a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004c6305-7649-4c90-a3f9-1e89fed2dc64/engineering_materials_and_processes_desk_reference.pdfIn PDF document text
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_99f8ac56bafd44528d1f1627ede604db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c6f7e6-5f4e-4b09-bf19-bcee58122158/sims_3_patch_mac_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71ec954-cfd5-42fe-a167-ae0eb13ab6c1/the_fork_the_witch_and_the_worm_volume_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f62aa9a-eea4-42fd-9bd1-7ddf9c09ed30/harbor_freight_21_gallon_air_compressor_not_building_pressure.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 5684 bytes
SHA-256: 19b8a1c3980a616353f269e0ef79431848689477caca8cbe17e9145734fc9000
font_01_sfnt_off00010a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4D 11684 bytes
SHA-256: ac7f11ae4e5cbfc765bb0063bf6347f80db441606c2671b82b9e7c6991e1c53e
font_02_sfnt_off00013164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13164 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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